Features

• Large filter area, reliable operating mechanism and simple construction make the SAF filter the ideal solution for filtration of poor quality water to very fine filtration degrees
• Automatic flushing according to pressure differential and/ or according to time
• No interruption of downstream flow during flushing
• Robust and reliable Self-Cleaning mechanism even on marginal operation conditions
• Minimal volume of reject water allows excellent operation in continuous flush mode
• Applications: Water supply systems, Irrigation systems, Cooling Water, Waste Water Treatment, Industrial Pre-Filtration, etc.
• Industries: manufacturing, mining, water and wastewater treatment plant, turf and agriculture, etc.

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How the SAF Filters work

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The Filtering Process

Raw water enters the filter inlet (1) through the coarse screen (2) which protects the cleaning mechanism from large debris. The water passes through the fine screen (3), trapping dirt particles which accumulate inside the filter.

Clean water flows through the filter outlet (4).

The gradual dirt buildup on the inner screen surface causes a filter cake to develop, with a corresponding increase in the pressure differential across the screen. A pressure differential switch senses the increased pressure differential and when it reaches a pre-set value, the cleaning process begins.

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The Self-Cleaning Process

Cleaning of the filter is carried out by the suction scanner (5) which spirals across the screen; the open exhaust valve creates a high velocity suction stream at the nozzles tip which “vacuums” the filter cake from the screen. During the self-cleaning process, which takes between 20 to 40 seconds, filtered water continues to flow downstream.

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The Control System

Two types of control boards are available for the SAF filters: PLC or Electro-Mechanical Relay and Timer. The self-cleaning cycle begins under any one of the following conditions:

1. Receiving a signal from the Pressure Differential Switch (6)

2. Time interval parameter set at the control board

3. Manual Start

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The control board also provides:

• Optional continuous flush operation mode
• Flush cycles counter
• Alarm or an alternative reaction at malfunction mode; open a bypass, shut-off a pump, etc.

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“SAF” Models

Amiad’s “SAF” product-line consists of the following models:

SAF-1500 for up to 80 m³/h (350 gpm)

SAF-3000 for up to 150 m³/h (660 gpm)

SAF-4500 for up to 250 m³/h (1100 gpm)

SAF-6000 for up to 400 m³/h (1,760 gpm)

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Amiad - SAF 1500

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Amiad - SAF 3000

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Amiad - SAF 4500

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Amiad - SAF 6000

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Typical Installation Drawing and Head Loss Graphs in Clean Water

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Technical Specifications

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General Data

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Flushing Data

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Screen Data

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Control and Electricity

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*Construction Materials